Now Drake did not discover extraterrestrial intelligence, but he learned a very valuable lesson from a passing aircraft, and that's that terrestrial technology can interfere with the search for extraterrestrial technology.

So, another random thing I do is the search for extraterrestrial intelligence, or SETI.

What's more likely that Arnold had a little extraterrestrial help in his run for the governorship?

Written between 1895 and 1897, it is one of the earliest stories that detail a conflict between mankind and an extraterrestrial race.

A team led by Luis Alvarez proposed in 1980 an extraterrestrial origin for this iridium, attributing it to an asteroid or comet impact.

The Society is dedicated to the exploration of the Solar System, the search for Near Earth Objects, and the search for extraterrestrial life.

Alternative biology is the study of theoretical or non traditional life forms such as acellular life, non carbon based life, extraterrestrial life, cyborg life, or artificial life.

So, perspective is everything and, because of the history that I've just briefly talked to you about, I have learned to think about Earth as an extraterrestrial planet.

The images were designed by Carl Sagan and Frank Drake and were unique in that their graphical meanings were to be understandable to extraterrestrial beings, who would have no conception of human language.

I mean, what's more likely that extraterrestrial intelligences or multi dimensional beings travel across the vast distances of interstellar space to leave a crop circle in Farmer Bob's field in Puckerbrush, Kansas to promote skeptic.com, our webpage?